/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package aptech.lab.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author vulh
 */
public class SessionTracker2 extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet SessionTracker2</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet SessionTracker2 at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        HttpSession session = request.getSession(true);

        Integer totalCount = (Integer) getServletContext().getAttribute("total");

        if (totalCount == null) {
            totalCount = new Integer(1);
        } else {
            totalCount = new Integer(totalCount.intValue() + 1);
        }

        Integer count = (Integer) session.getAttribute("count");

        if (count == null) {
            count = new Integer(1);
        } else {
            count = new Integer(count.intValue() + 1);
        }

        session.setAttribute("count", count);
        getServletContext().setAttribute("total", totalCount);

        out.println("<html><head><title>SessionSnoop</title></head>");
        out.println("<body><h1>Session Details</h1>");
        out.println("You've visited this page " + count + ((count.intValue() == 1) ? " time." : " times.") + "<br/>");
        out.println("Total number of visits: " + totalCount + "<br/>");
        out.println("<h3>Details of this session:</h3>");
        out.println("Session id: " + session.getId() + "<br/>");
        out.println("New session: " + session.isNew() + "<br/>");
        out.println("Timeout: " + session.getMaxInactiveInterval() + "<br/>");
        out.println("Creation time: " + new Date(session.getCreationTime()) + "<br/>");
        out.println("Last access time: " + new Date(session.getLastAccessedTime()) + "<br/>");
        out.println("</body></html>");
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
